Let’s have some comparison.
Uses an unforged non personal weapon. Movement assists are sadly not that great for scoring except for L!Lucina’s and L!Chrom’s. fury is a very weak scoring ability, as well as single stat stances and blows. B skills such as Guard, desperation, and vantage score poorly. Many single stat hones and Spurs score really poorly.
Refining non personal weapons score much better than not refining them. Dual rallies score higher than movement assists. AOE’s score higher than regular Specials. (Pretend it’s there.) Dual stat effecting skills score better than single as well as bonds and brazens. I think there are only two levels of B skills and Renewal and wings of mercy are very cheap ones for the higher ones. Any Dual spur or Drive skills score higher than most others, smokes are also effective.
Personal weapons score the highest, refined or not. Dual rally + or Harsh Command+ score the highest for Assist. Aether, Galeforce, Ruptured Sky, Blue Flame, and any personal Special scores the highest. Tier 4 skills always score as high as possible, as well as Close counter or distant counter. Duel skills also count as much but also raise BST score.
Sorry for inaccurate pictures but he has the most fodder I could move around to show you. I could have gone to unit build but didn’t feel like it.